How do you keep your daily stand-up on track?

This question came up recently, "How do you keep your daily stand-up on track?" I answered by sharing what worked for me.

The way teams I have been on (and teams I have helped coach) kept things tracking was we agreed to the rules: Everyone must answer the three questions. (What did I do? What am I going to do? What is stopping me from getting things done?) No one may talk for more than two minutes. If there is an issue that needs to be discussed, they write it on the whiteboard. Anyone can tell someone they are taking too long, and the person speaking needs to finish quickly.
 
After everyone has answered the three questions, everyone is allowed to sit down (since the stand-up was over). Then the team runs down the list of things on the whiteboard. Decisions are made quickly. If a decision cannot be made quickly, the topic is moved offline. If something only requires part of the team to be resolved, the interested parties can take care of it immediately after the meeting breaks up. 

Of course, I have heard of teams using egg timers or stopwatches.